Free Books from Other Publishers

Introduction

We have long supported publication
of free documentation (free in
the sense of freedom—we don't mean gratis).
free software needs free
documentation because you must be free to copy, change and
redistribute the documentation along with the software. To qualify as
free, the documentation must be released under a
free
documentation license.

Some commercial publishers are also publishing free books.
(Like ours, these books are free in the sense of freedom; the commercially
printed copies are sold.) On this page, we list the ones
we have come across. If you find out about a free book that is not
listed here, please let us know by writing to <[email protected]>.

Some of these publishers (e.g., Network Theory Ltd) do not trade
directly. Their books can be obtained from many suppliers throughout the
world, but please don't order them, or any other book, from Amazon!

The June 2001 printing of this book failed to list the license
notification properly. This printed edition says it is a proprietary
book. The publisher has assured us that this was purely a printing error
and that the intended license is “Open Publication License,
Version 1.0,
No options exercised”. Their errata page
confirms this. They have assured us that the next printing will have the
corrected license.